{"note":"bim_versions 導入後の保存のみ記録 (それ以前は bim_canonical 上書きで履歴なし)","ok":true,"slug":"u-house-sgh6djpr","versions":[{"created_at":"2026-06-23T19:25:33Z","element_count":83,"note":"5軸GA polish 45->96 by M5 (autonomous)","saved_by":"mcp","sha256":"14aecc4239b95f40d26a76ea30519d926e9ec25148b5c5be22d243d54bd231f9","version":3},{"created_at":"2026-06-23T19:22:15Z","element_count":105,"note":"loop3: 設計時延床 85.0㎡ を投入 (見積過大の根治)","saved_by":"mcp","sha256":"f1c940047b85dccac067a2cd9c8d5956f9b7dc05fb0a003482a233601daea0b6","version":2},{"created_at":"2026-06-23T19:22:14Z","element_count":105,"note":"言葉から生成: LDK+主寝室+子供室2+浴室+収納","saved_by":"mcp:create","sha256":"","version":1}]}